On Monday, the 20-year-old actress/singer shared an Instagram photo of herself and sister Dani Thorne posing in bikinis on the streets of NYC.

The siblings’ swimsuits — one red, the other yellow — are part of Thorne’s Filthy Fangs line, and are available for $60. And according to the former Disney star’s caption, the impromptu photoshoot was meant to help the duo boost their confidence before taking the stage at Billboard’s Hot 100 Festival.

Bella ThorneBella Thorne, Instagram

“Out of all the s—tty rehearsals I did for billboard this is the one that made me feel pretty much confident,” Thorne wrote. “If me and dani could walk around Newyork city w our asses out then we could forsure step on that huge mainstage and rock out.”

But it wasn’t what Thorne was (or wasn’t) wearing that caused a stir: In another shot the star shared on her Instagram Stories, her armpit hair is clearly visible.

Thorne has long been vocal about her attachment to her body hair. Last month, she penned an article for InStyle magazine calling herself “one of the hairiest teenage girls” and calling out critics who make fun of her unshaven armpits. “Whether I’m a tomboy or a rebel, I’m comfortable with it, so why shouldn’t you be?” Thorne wrote.

This time, instead of clapping back at the haters telling her to shave, the star called out fans who bought her bikinis to thank them for their support.